{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x903aa73bee395c191d32742fc95232295c28ba6b52fe8e5082c0f7ea3a5e2128",
    "signature": "0xbde1f9d574a29a56e7bcf5e18132cb7cce5506e4b64da75eb9c70203228d9448152b4466fe1e109230aa9c3bd948e6bd6aedc43d73b06e0e299ef98852edb3931b",
    "signer": "0xb6413740e5fDCf62484E710B6c61C3BaA17b64D7",
    "userId": "665864521"
  }
}